<template>
  <div class="my-tab-bar">
    <div class="tab-item" 
    v-for="(item, index) in list" :key="index"
    :class="{ current: index === activeIndex }"
    @click="clickFn(index,item.componentName)"
    >
      <!-- 图标 -->
      <span class="iconfont" :class="item.iconText"></span>
      <!-- 文字 -->
      <span>{{ item.text }}</span>
    </div>
  </div>
</template>

<script>
export default {
  props: {
    list: {
      //限定传过来的数据是数组
      typr: Array,
      //必传
      required: true,
      //⬇验证 val  就是传过来的数据  此函数可以返回 true/false 
      // 返回true代表通过验证   false 代表未通过验证
      validator(val) {
        if (val.length < 2 || val.length > 5) {
          console.error('瓜娃子   只能写2~5之间啊');
          // 中断
          return false
        }
        return true
      },
    },
  },
  methods:{
    clickFn(index , componentName){
      this.activeIndex = index
      this.$emit('changeComName',componentName)
    }
  },
  data(){
    return{
      //默认值 默认第一个高亮
      activeIndex:0
    }
  }
};
</script>

<style lang="less" scoped>
.my-tab-bar {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 50px;
  border-top: 1px solid #ccc;
  display: flex;
  justify-content: space-around;
  align-items: center;
  background-color: white;
  .tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
  }
}

.current {
  color: #1d7bff;
}
</style>